Following on from the discussion of the constitutionality of WV being admitted as a state, Congress did not just ignore the requirement for VA to consent.
There was a pro-Union VA government which had broken away from Confederate VA. It consented to the division of the state. It was also a condition of VA being re-admitted to representation in Congress, after the civil war, that the state confirmed the consent to admit WV.
Extract from the Bills and Resolutions of the Senate, when the bill to admit WV was reported. This confirms that the pro Union VA government had given its consent.
http://memory.loc.gov/cgi-bin/query/D?hlaw:1:./temp/~ammem_l6tI::
June 23, 1862
Mr. Wade, from the Committee on Territories, reported the following bill; which was read and passed to a second reading. A Bill Providing for the admission of the State of West Virginia into the Union. Whereas, by an act of the State of Virginia, passed May thirteenth, eighteen hundred and sixty-two, entitled ''An act giving the consent of the legislature of Virginia to the formation and erection of a new State within the jurisdiction of this State,'' the people of that part of the State of Virginia including the counties of Hancock, Brooke, Ohio, Marshall, Wetzel, Marion, Monongalia, Preston, Taylor, Tyler, Pleasants, Ritchie, Doddridge, Harrison, Wood, Jackson, Wirt, Roane, Calhoun, Gilmer, Barbour, Tucker, Lewis, Braxton, Upshur, Randolph, Mason, Putnam, Kanawha, Clay, Nicholas, Cabell, Wayne, Boone, Logan, Wyoming, Mercer, McDowell, Webster, Pocahontas, Fayette, Raleigh, Greenbrier, Monroe, Pendleton, Hardy, Hampshire, and Morgan, did, with the consent of the legislature of said State of Virginia, form themselves into an independent State, and did establish a constitution for the government of the same:
